Normally we'd give a brand new site a break for not immediately having an API. When it comes to the rabidly popular FourSquare, which launched in March, developers have been clamoring to build on top of the service. So, today's launch of the FourSquare API (our FourSquare API profile) is bound to be met with extreme enthusiasm.

Facebook is taking another big reach toward location sharing with its latest update to its Places API. When the platform launched in August, we wrote that it was "read only for now." Now all developers can, with users' permission, share their locations on Facebook. And, perhaps more exciting, Facebook has opened up its venue database to help out.

The RouteSavvy API allows you to add route optimization features to any application. It is a REST service for optimizing driving stop order for both GET and POST options. Requests use JSON formatted...

The Microsoft Bing Maps Snap to Road API, developers can specify GPS points including latitude and longitude coordinates. Data can be collected along a route to return a corresponding a set of points...